(57) The present invention discloses a beam processing device, a beam attenuation and
switching device, and an optical wavelength selective switch system. The beam processing
device in the present invention includes a polymer polarization grating (1021) and
a quarter-wave plate array (1022). Splitting and adjustment of a beam polarization
state may be implemented by using the polymer polarization grating and the quarter-wave
plate array. The beam attenuation and switching device includes a switchable polarization
grating and an optical path angle adjustment device, or includes a half-wave liquid
crystal plate, a quarter-wave plate, a polymer polarization grating, and an optical
path angle adjustment device. The optical wavelength selective switch system includes
the foregoing beam processing device and the foregoing beam attenuation and switching
device, where a structure is relatively simple, assembly is also relatively simple,
and production technologies of the polymer polarization grating, the quarter-wave
plate, and the switchable polarization grating are relatively simple; therefore, embodiments
of the present invention may simplify a production technology, reduce a cost, and
improve performance.
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